writerfilter: unused tag attributes
writerfilter: unused tag attributes

These were used by the now removed analyzemodel, effort and modelcleanup
scripts, so can be removed as well.

Change-Id: I3a3ed98b914e8ee21a2ffccdc399821fded90708

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core